The Gung-Fu is the first yo-yo produced by manufacturer Death By Yo-Yo. It was originally named the "Fa5t-Fu", supposedly a play-on words of the term "fast food" and "kung fu". However, after a controversy with people accusing James Copley of ripping off the name of YoYoFactory's F.A.S.T. line, he then changed the name to "Gung-Fu".

It is a Butterfly-shaped yo-yo machined out of delrin. It comes with flowable silicone as its response system, but can also accept O-rings and has a slight pad recess that will take response pads. The yo-yo comes in a variety of hand-dyed colorways, as well. It also has spikes on the sides for Matador-tyle tricks.

(Gen 2) Gung-Fu

The Second Generation (Gen 2) Gung-Fu had a few subtle differences from the first Gen.

The response groove was shallower, so it could no longer accept O-rings. It also features Silicone O-Sticker response (According to James, this made the manufacturing process move faster).

The surface texture was slightly changed for better grinding, and more vibrant colorways.

It came unresponsive out of the package.

Slightly changed packaging

New colors

(Gen 3) Gung-Fu

There was also a Third Generation (Gen 3). Not very many of these were made. They are exactly the same as the Second Generation Gung-Fus, but they are beadblasted.